EP2706020B1 - Récipient pour fil de soudage avec deux éléments de maintien superposés - Google Patents

Récipient pour fil de soudage avec deux éléments de maintien superposés Download PDF

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Publication number
EP2706020B1
EP2706020B1 EP12183193.7A EP12183193A EP2706020B1 EP 2706020 B1 EP2706020 B1 EP 2706020B1 EP 12183193 A EP12183193 A EP 12183193A EP 2706020 B1 EP2706020 B1 EP 2706020B1
Authority
EP
European Patent Office
Prior art keywords
retainer
wire
hollow body
previous
container according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP12183193.7A
Other languages
German (de)
English (en)
Other versions
EP2706020A1 (fr
Inventor
Roberto Stocchetti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ISAF SpA
Original Assignee
ISAF SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ISAF SpA filed Critical ISAF SpA
Priority to ES12183193.7T priority Critical patent/ES2648290T3/es
Priority to EP12183193.7A priority patent/EP2706020B1/fr
Priority to PL12183193T priority patent/PL2706020T3/pl
Publication of EP2706020A1 publication Critical patent/EP2706020A1/fr
Application granted granted Critical
Publication of EP2706020B1 publication Critical patent/EP2706020B1/fr
Not-in-force legal-status Critical Current
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/02—Containers, packaging elements or packages, specially adapted for particular articles or materials for annular articles
    • B65D85/04—Containers, packaging elements or packages, specially adapted for particular articles or materials for annular articles for coils of wire, rope or hose
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H49/00—Unwinding or paying-out filamentary material; Supporting, storing or transporting packages from which filamentary material is to be withdrawn or paid-out
    • B65H49/02—Methods or apparatus in which packages do not rotate
    • B65H49/04—Package-supporting devices
    • B65H49/06—Package-supporting devices for a single operative package
    • B65H49/08—Package-supporting devices for a single operative package enclosing the package
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/36—Wires

Definitions

  • the present invention relates to a container or a drum for packaging, storing, transporting and unwinding a coil or spool of welding wire with two internal mobile rings or retainers for holding the wire spool.
  • a major well-known problem in automatic and robotic welding when using a welding wire that comes out of a drum and that is delivered to a welding torch or similar, are the twists of the wire that are created by the coil spooling process. Indeed, twists often appear when a wire is extracted from a drum or similar by the welding machine comprising the welding torch to which the wire is fed.
  • twists in wire are a serious concern as they lead to subsequent welding defects and quality problems in the welding joints thus obtained.
  • the twists involve wire distortions leading to oscillations of the wire in the contact tip of the welding equipment, i.e. the welding torch or similar, and to an irregular distribution of the wire during the welding operation.
  • document EP-A-519424 proposes a container with a retainer device placed on the top of the coil and having an outer periphery matching the diameter of the inner wall of the container and an inner bell-mouthed portion defining a wire extraction opening.
  • EP-A-636098 teaches the use of a square box with an internal flat cover, arranged on the wire coil and having a peripheral square border that matches the internal shape of the box.
  • EP-A-1053189 discloses a polygonal box-like body for accommodating a circular coil of wire and a retainer device arranged inside the body on the coil for preventing accidental entanglement of the wire, and a wire conduit device for the guidance of the wire out from the body during the unwinding.
  • the retainer device described in EP-A-1053189 is however too complicated and expensive to manufacture commercially.
  • EP-A-1693139 discloses a drum for a welding wire coil comprising a wire holding device positioned on the coil for holding it.
  • the holding device has a rigid central disc and a flexible cover with a dimension greater than an inner diameter of the drum so that corner portions of the cover slightly rise along an inner wall of the drum.
  • EP-A-1693140 discloses a drum with a conical, tapered or pyramidal inner wall formed of oblique pieces and comprising a rigid central disc with a central orifice positioned on the coil and across which the wire passes, and further with flexible and deformable peripheral expansions projecting beyond the edge of the disc to maintain the wire loops.
  • the container should preferably be configured so as to prevent the wire from passing between the peripheral border of the retainer ring and the inner surface of the drum while the welding machine is pulling out the wire through the central hole of the retainer device. This serves to prevent the wire from laying on a portion of the retainer device and being blocked from further pulling.
  • the retainer device should also preferably be able to exercise a constant pressure on the spool without becoming blocked by the walls of the drum, while the spool unwinds downwardly in the drum.
  • the container should preferably also be easy to transport and to handle, stable during utilization and preferably made of recycle material, such as cardboard.
  • a solution according to the invention is a container for packaging a coil of welding as defined in claim 1 which is formed of a hollow body which comprises a peripheral wall and a bottom part, said hollow body further comprising a first retainer, said first retainer 4 having a first diameter D1 and being axially mobile in said hollow body 1, characterized that it comprises a second axially mobile retainer positioned on the first retainer 4, said first and second retainers each having a flat ring-shape with a central opening, the second retainer having a second diameter D2 less than the first diameter D1, i.e. D2 ⁇ D1.
  • a container or drum according to the present invention comprises the following additional features:
  • a container according to the present invention can be used in a robotic or automatic welding operation, preferably an electric arc welding process, such as a MIG or MAG welding process.
  • Figure 1 shows an embodiment of a container or drum for packaging a coil or spool 6 of welding wire 7, such as a flux cored wire or a metal cored wire, according to the present invention.
  • the welding wire container comprises a unique hollow body 1, which comprises a peripheral wall 2 and a bottom part 3 at its lower end, said bottom part 3 is integral with the peripheral wall 2.
  • the hollow body 1 can further comprise, at its upper end, a cover 8 for closing the container with a central orifice 18, such as a hole or a slot, through which the wire 7 passes during the unwinding of the spool 6 during a welding operation, so that the wire 7 is extracted from the hollow body 1 through the small outlet 18 arranged at the center of the cover 8.
  • the hollow body 1, the bottom part 3 and the cover 8 are preferably made of cardboard, such as reinforced cardboard or similar.
  • the hollow body 1 has a cylindrical shape. However, it can have other shapes, including polygonal shapes such as square (See Figure 4 ), pentagonal, hexagonal or octagonal (see Figure 5 ).
  • the retainers 4, 5 have peripheral profiles or shapes that can match the inner wall of the drum as visible in Figures 3 to 5 .
  • the first and second retainers 4, 5 may also have different shapes or profiles, for example one can be circular, whereas the other can be polygonal.
  • Peripheral wall 2 is preferably made of one rectangular piece of cardboard that is bent so as to obtain the desired shape forming the hollow body 1 and having its two opposite parallel edges attached one to the other, for instance stapled, glued or bonded together so as to obtain a closed body.
  • the bottom part 3 is fixed to said peripheral wall 2 by any suitable connection means, for instance it can be stapled, glued, bonded or similar.
  • the internal diameter D of the hollow body 1 is typically between 45 cm and 120 cm, but preferably between 30 and 70 cm, whereas its height is generally between 65 and 130 cm, preferably between 75 and 110 cm.
  • a circular coil 6 of welding wire 7 is disposed on the bottom part 3 in said hollow body 1.
  • Said wire spool 6 comprises a plurality of wire turns forming spirals.
  • a pair of superimposed mobile retainers 4, 5 is arranged on the top of the welding wire coil 6.
  • the retainers 4, 5 are place one on the other so as to be in contact one another.
  • the first 4 and second 5 retainers are used for maintaining the wire spirals of the coil 6 and for ensuring a smooth extraction of the wire 7 during unwinding, i.e. the wire exits with no or limited twists or knots.
  • the axially-mobile retainers 4, 5 both comprise a central opening 14, 15, respectively, through which passes the wire 7, before passing through the central orifice 18 of the cover 8, while being extracted/pulled by the welding machine, such as a welding robot or the like.
  • the axially-mobile retainers 4, 5 maintain the wire spirals due to their top-to-bottom motion and weight, and thereby preventing accidental entanglement of the wire spirals forming the spool 6.
  • Each retainers 4, 5 consists in a perforated generally flat structure, typically a flat structure, such as a disc made of cardboard, wood or plastic or a combination of these materials. According to the invention, it is important that the first and second retainers 4, 5 have each a flat ring-shape with a central opening 14, 15.
  • the first and second retainers 4, 5 can have a same thickness and/or a same weight or have different thicknesses and/or weights, for example a thickness comprises between 0,5 and 20 mm and a weight comprised between 50 g and 5 kg preferably between 60 and 1 kg.
  • the dimensions i.e. the diameters D1, D2
  • the dimensions of the central opening 14, 15 of the retainer 4, 5 are also carefully chosen to allow a constant and continuous feeding of the wire 7 to a welding torch, at nearly constant drawing force, so that the spooled wire 6 is prevented from entangling and forming loops, as the wire is constantly kept under the axially-mobile retainers 4, 5.
  • the first and second retainers 4, 5 have both a smaller size, i.e. diameter D1, D2, than the internal diameter D of the container 1 so that they can freely descend in the container in contact with the coil as the height of said coil decreases as the wire 7 is being unwound from the coil 6.
  • the first diameter D 1 of the first retainer 4 is slightly less than the internal diameter D of the container, i.e. the first diameter D1 of the first retainer 4 substantially matches the inner shape and is almost equal to the internal diameter D of the container 1 as defined in claim 1.
  • the second retainer 5 has a second diameter D2 that is less than the first diameter D1 of the first retainer 4 and than the internal diameter D of the container 1, i.e. D2 ⁇ D1 ⁇ D.
  • the peripheral border of the first retainer 4 is spaced from the inner wall 2 of the drum 1 of a distance E of about 1 to 3 mm, whereas the peripheral border of the second retainer 5 is spaced from the inner wall 2 of the drum 1 of a greater distance E' of about 15 to 30 mm.
  • first dimension d1 of the first central opening 14 of the first retainer 4 i.e. its internal diameter as shown in Figure 2
  • second dimension d2 of the second central opening 15 of the second retainer 5 i.e. its internal diameter, i.e. d1 > d2. This is important for ensuring a smooth extraction of the wire 7.
  • a container according to the present invention leads to unexpected results in terms of the removal of wire twists or similar effects as shown in Figure 6 .
  • wire A extracted from a container according to the present invention exhibits a rather straight-line shape, i.e. almost without any twists or waves
  • wire B extracted from a container according to the prior art comprising a unique internal retainer, exhibits a rather wave-shape which is problematic for ensuring a smooth and regular automatic or robotic welding operation using said wire B.
  • wire amplitude on the floor (as shown in fig. 6 ) and helix for wires A and B are given in Table 2 below.
  • Table 2 Wire A Wire B Wire amplitude on the floor ⁇ 10 cm 20 +/- 35 cm Wire helix ⁇ 0,5 cm 2 +/- 10 cm
  • the wire amplitude and helix are both much less for wire A (invention) than for wire B (prior art), leading to a straighter and more linear wire after unwinding. This limits the wire oscillations in the contact tip of the welding torch or similar device, and subsequent welding defects.
  • the container of the invention can be arranged on a pallet, for instance a pallet made of wood or of polymer material.
  • the container according to the invention is suitable for use in a robotic or automatic welding operation, such as laser or arc welding process, preferably an electric arc welding process, such as a MIG or MAG welding process.
  • a robotic or automatic welding operation such as laser or arc welding process, preferably an electric arc welding process, such as a MIG or MAG welding process.
  • the wire extracted from the container is fed to a welding torch that is either arranged on a welding machine or on a robotic articulated arm, said torch being used for progressively melting the welding wire and thus obtaining a welding joint.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
  • Unwinding Of Filamentary Materials (AREA)

Claims (13)

  1. Récipient pour emballer une bobine de fil de soudage, comprenant un corps creux (1) avec une paroi périphérique (2) et une partie inférieure (3), ledit corps creux (1) comprenant en outre un premier élément de maintien (4), ledit premier élément de maintien (4) ayant un premier diamètre (D1) et étant mobile axialement dans ledit corps creux (1), et un second élément de maintien mobile axialement (5) placé sur le premier élément de maintien (4), lesdits premier et second éléments de maintien (4, 5) ayant chacun une forme d'anneau plat avec une ouverture centrale (14, 15), le second élément de maintien (5) ayant un second diamètre (D2) inférieur au premier diamètre (D1), les premier et second éléments de maintien (4, 5) étant agencés sur le dessus d'une bobine de fil de soudage (6) placée à l'intérieur du corps creux (1), une première dimension (d1) de la première ouverture centrale (14) du premier élément de maintien (4) étant supérieure à une seconde dimension (d2) de la seconde ouverture centrale (15) du second élément de maintien (5), le premier élément de maintien et le second élément de maintien pouvant se déplacer l'un par rapport à l'autre lors du déroulage, créant ainsi un espace entre eux,
    caractérisé en ce que la limite périphérique du premier élément de maintien (4) est espacée de la paroi périphérique (2) du corps creux (1) d'une première distance (E) d'environ 1 à 3 mm, et la limite périphérique du second élément de maintien (5) est espacée de la paroi périphérique (2) du corps creux (1) d'une seconde distance (E') d'environ 15 à 30 mm.
  2. Récipient selon l'une quelconque des revendications précédentes, caractérisé en ce que la première dimension (d1) de la première ouverture centrale du premier élément de maintien mesure entre 30 et 79 cm, et la seconde dimension (d2) de la seconde ouverture centrale du second élément de maintien mesure entre 29 et 78 cm.
  3. Récipient selon l'une quelconque des revendications précédentes, caractérisé en ce que les premier et second éléments de maintien (4, 5) sont fabriqués à partir de carton.
  4. Récipient selon l'une quelconque des revendications précédentes, caractérisé en ce que le premier élément de maintien (4) et le second élément de maintien (5) sont superposés et en contact direct l'un avec l'autre.
  5. Récipient selon l'une quelconque des revendications précédentes, caractérisé en ce que le premier élément de maintien (4) et le second élément de maintien (5) ont une forme généralement circulaire.
  6. Récipient selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une bobine circulaire (6) de fil de soudage (7) est disposée sur la partie inférieure (3) dudit corps creux (1).
  7. Récipient selon l'une quelconque des revendications précédentes, caractérisé en ce que le récipient comprend un couvercle (8).
  8. Récipient selon l'une quelconque des revendications précédentes, caractérisé en ce que la paroi périphérique (2) du corps creux (1) est fabriquée à partir d'un matériau à base de carton.
  9. Récipient selon l'une quelconque des revendications précédentes, caractérisé en ce que le diamètre interne (D) du corps creux (1) mesure entre 45 cm et 120 cm et en ce que la hauteur du corps creux (1) mesure entre 65 et 120 cm.
  10. Récipient selon l'une quelconque des revendications précédentes, caractérisé en ce que le corps creux (1) a une forme cylindrique.
  11. Récipient selon l'une quelconque des revendications précédentes, caractérisé en ce que les éléments de maintien (4, 5) ont une épaisseur comprise entre 0,5 et 20 mm.
  12. Récipient selon l'une quelconque des revendications précédentes, caractérisé en ce que les éléments de maintien (4, 5) ont un poids compris entre 50 g et 5 kg.
  13. Procédé de soudage robotisé ou automatisé, dans lequel un fil de soudage est fondu par un arc électrique ou un faisceau laser, caractérisé en ce que le fil délivré au chalumeau est extrait d'un récipient selon l'une quelconque des revendications précédentes.
EP12183193.7A 2012-09-05 2012-09-05 Récipient pour fil de soudage avec deux éléments de maintien superposés Not-in-force EP2706020B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES12183193.7T ES2648290T3 (es) 2012-09-05 2012-09-05 Recipiente para alambre de soldadura con dos elementos de retención superpuestos
EP12183193.7A EP2706020B1 (fr) 2012-09-05 2012-09-05 Récipient pour fil de soudage avec deux éléments de maintien superposés
PL12183193T PL2706020T3 (pl) 2012-09-05 2012-09-05 Pojemnik do drutu spawalniczego z nałożonymi dodatkowo dwoma elementami ustalającymi

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12183193.7A EP2706020B1 (fr) 2012-09-05 2012-09-05 Récipient pour fil de soudage avec deux éléments de maintien superposés

Publications (2)

Publication Number Publication Date
EP2706020A1 EP2706020A1 (fr) 2014-03-12
EP2706020B1 true EP2706020B1 (fr) 2017-08-23

Family

ID=46934453

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12183193.7A Not-in-force EP2706020B1 (fr) 2012-09-05 2012-09-05 Récipient pour fil de soudage avec deux éléments de maintien superposés

Country Status (3)

Country Link
EP (1) EP2706020B1 (fr)
ES (1) ES2648290T3 (fr)
PL (1) PL2706020T3 (fr)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0133562Y2 (fr) * 1984-11-20 1989-10-12
CA2071419C (fr) 1991-06-18 1996-03-19 William Dimmett Cooper Rondelle retenue pour contenant a bobine de fil a souder
IT231566Y1 (it) 1993-02-23 1999-08-04 Sidergas Srl Contenitore di imballaggio e di svolgimento di una matassa di filo metallico
WO1998052844A1 (fr) 1997-05-20 1998-11-26 Esab Ab Conteneur pour l'emballage et le deroulement d'une bobine de fil-electrode
FR2882038A1 (fr) 2005-02-17 2006-08-18 Soudure Autogene Francaise Sa Conteneur de conditionnement de fil de soudage avec dispositif interne de retenue des spires
FR2882039B1 (fr) 2005-02-17 2007-04-27 Soudure Autogene Francaise Sa Conteneur a paroi interne oblique pour le conditionnement d'un fil de soudage
KR100740253B1 (ko) * 2006-12-13 2007-07-16 고려용접봉 주식회사 용접 와이어용 페일팩
EP2256064A1 (fr) * 2009-05-27 2010-12-01 ISAF S.p.A. Conteneur pour fil de soudage avec éléments allongés pour maintenir la bobine de fil
EP2354039A1 (fr) * 2010-01-27 2011-08-10 Oerlikon Schweisstechnik GmbH Conteneur pour fil de soudage avec système de rétention interne
US8985495B2 (en) * 2010-07-09 2015-03-24 Hyundai Welding Co., Ltd. Device for preventing entanglement of welding wire

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
ES2648290T3 (es) 2017-12-29
EP2706020A1 (fr) 2014-03-12
PL2706020T3 (pl) 2018-01-31

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